PDCCH Repetition Search Space Linking for Overlap Ambiguity
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Solution Overview
Problem
Ambiguities arise in wireless communications systems due to overlapping search space sets with the same control resource set, leading to unclear monitoring of physical downlink control channels, which affects decoding reliability and efficiency.
Innovation Solution
Implementing various overlap rules to resolve ambiguities in search space set linking for physical downlink control channel repetition, including determining links between search space sets, monitoring occasions, and decoding strategies based on CORESET and DCI format differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple search space sets are configured with the same CORESET for PDCCH repetition, then decoding reliability is improved through redundancy, but monitoring ambiguity increases making it unclear which search space set should be monitored
Solution Approach 1:
The patent segments the monitoring decision process by introducing specific criteria (different CORESET IDs, different TCI states, different DCI formats) that divide the ambiguous monitoring space into distinct, resolvable categories. This allows the UE to systematically determine which search space set to monitor based on configurable parameters rather than facing undifferentiated ambiguity.
Solution Approach 2:
The patent changes the monitoring behavior based on parameter differences between search space sets. When parameters such as CORESET ID, TCI state, or DCI format differ between overlapping search space sets, the UE adjusts its monitoring strategy accordingly, resolving ambiguity through parameter-based differentiation.
2Reliability
If the UE monitors all search space sets for PDCCH candidates, then decoding reliability is improved, but power consumption increases due to redundant monitoring and decoding operations
Solution Approach 1:
The patent applies partial action by having the UE monitor only a subset of search space sets based on configured criteria rather than all search space sets. The UE performs monitoring selectively according to parameters such as whether CORESET IDs differ, TCI states differ, or DCI formats differ, avoiding redundant monitoring and reducing power consumption while maintaining sufficient decoding reliability.
Solution Approach 2:
The system enables self-service by configuring the UE with specific monitoring criteria that allow it to autonomously determine which search space sets to monitor without continuous network intervention. The UE uses pre-configured parameters to self-regulate its monitoring behavior, reducing unnecessary power consumption while maintaining reliability.
3Device complexity
If search space sets with identical resources are treated as a single candidate, then blind decoding complexity is reduced, but information loss occurs when DCI formats differ between the sets
Solution Approach 1:
The patent applies local quality by treating search space sets differently based on their local characteristics. When DCI formats differ between overlapping search space sets, the UE is configured to monitor both sets separately rather than treating them as identical. This localized differentiation ensures that format-specific information is not lost while still reducing complexity when formats are identical.
Data Source
AI summary
Methods, systems, and devices for communications management are described. In one example, a method for wireless communication at a user equipment (UE) is described. The method may include receiving a configuration of a first search space (SS) set and a second SS set and identifying a link between the first SS set and the second SS set for physical downlink control channel repetition. The method may also include identifying one or more monitoring occasions in the first SS set or the second SS set to monitor for downlink control information based at least in part on an overlap rule associated with the link between the first SS set and the second SS set for physical downlink control channel repetition. The method may include monitoring the identified one or more monitoring occasions in at least the first SS set or the second SS set for the downlink control information.